code: def test_npsum(self):
      # GH#25282, GH#25335 np.sum should return a Timedelta, not timedelta64
      tdi = pd.TimedeltaIndex(["3h", "3h", "2h", "5h", "4h"])
      arr = tdi.array
  
      result = np.sum(tdi)
      expected = Timedelta(hours=17)
      assert isinstance(result, Timedelta)
      assert result == expected
  
      result = np.sum(arr)
      assert isinstance(result, Timedelta)
      assert result == expected
  
file_path: pandas/pandas/tests/arrays/timedeltas/test_reductions.py
imports: import numpy
  import pytest
  import pandas
  from pandas import Timedelta
  import pandas._testing
  from pandas.core import nanops
  from pandas.core.arrays import TimedeltaArray
label_desc: Use image node_id 5 for calling the TestReductions obj's underlying member method code with example usage: obj.test_npsum() without return types